<template>
	<view class="card" v-if="!loadding">
		<!-- #ifdef APP-PLUS -->
		<header-bar></header-bar>
		<!-- #endif -->
		<!--产品列表-->
		<template v-if="tableData.length > 0">
			<view class="address-bar d-e-c">
				<view class="f30" @click="isEdit = !isEdit">
					<button class="f24" v-if="isEdit">完成</button>
					<button class="f24" v-else>编辑</button>
				</view>
			</view>

			<view class="section">
				<view class="supplier_list">
					<view class="item" v-for="(item, index) in tableData" :key="index">
						<label class="d-c-c" @click="checkItem(item, index)"><checkbox value="cb" class="checkbox" :checked="item.checked" /></label>
						<image :src="item.product_image" class="cover" mode="aspectFit"></image>
						<view class="info">
							<view class="title">{{ item.product_name }}</view>
							<view class="describe">{{ item.product_sku.product_attr }}</view>
							<view class="level-box count_choose">
								<view class="price">
									¥
									<text class="num">{{ item.product_sku.product_price }}</text>
								</view>
								<view class="num-wrap">
									<view class="" @tap.stop="reduceFunc(item)" v-if="item.total_num > 1">
										<image class="reduce_icon" src="../../static/icon/reduce.png" mode=""></image>
									</view>
									<view class="text-wrap">{{item.total_num}}</view>
									<view class="" @tap.stop="addFunc(item)" v-if="item.total_num < item.product_sku.stock_num ">
										<image class="add_icon" src="../../static/icon/add.png" mode=""></image>
									</view>
								</view>
							</view>
						</view>
					</view>
				</view>
				
			</view>
		</template>
		<template v-else>
			<view class="none-data-box cart_none">
				<image class="cart_none_img" src="/static/cart_none.png" mode="widthFix"></image>
				<text class="f26 gray9 pt10">购物车空空如也</text>
				<button type="default" class="btn-gcred mt30 ww100 none_btn" @tap="gotoShop">去购物</button>
			</view>
		</template>

		<!--底部按钮-->
		<view class="bottom-btns f28" v-if="tableData.length > 0">
			<label class="d-c-c mr20" @click="onCheckedAll()">
				<checkbox class="checkbox" :checked="checkedAll" value="cb" />
				全选
			</label>
			<view class="d-e-c" v-if="!isEdit">
				<view class="total d-s-c flex-1 mr20">
					<text>合计：</text>
					<view class="price f22">
						¥
						<text class="num f40">{{ totalPrice }}</text>
					</view>
				</view>
				<button type="primary" class="buy-btn" @click="Submit()">去结算</button>
			</view>
			<view class="" v-else><button type="primary" @click="onDelete()" class="delete-btn mr20">删除</button></view>
		</view>

		<!--推荐-->
		<recommendProduct :location="10"></recommendProduct>
	</view>
</template>

<script>
import recommendProduct from '@/components/recommendProduct/recommendProduct.vue';
export default {
	components: {
		recommendProduct
	},
	data() {
		return {
			/*是否加载完成*/
			loadding: true,
			isEdit: false,
			/*购物车商品*/
			tableData: [],
			arrIds: [],
			// 是否全选
			checkedAll: false,
			totalPrice: 0
		};
	},
	onLoad() {},
	onShow() {
		/*获取产品详情*/
		this.getData();
	},
	methods: {
		/*获取数据*/
		getData() {
			uni.showLoading({
				title: '加载中'
			});
			let self = this;
			self._get('order.cart/lists', {}, function(res) {
				uni.hideLoading();
				self.tableData = res.data;
				self.loadding = false;
				self._initGoodsChecked();
			});
		},
		/**
		 * 初始化商品选中状态
		 */
		_initGoodsChecked() {
			let self = this;
			let checkedData = self.getCheckedData();
			// 将商品设置选中
			self.tableData.forEach(item => {
				item.checked = self.inArray(`${item.product_id}_${item.product_sku_id}`, checkedData);
			});
			self.isEdit = false;
			self.checkedAll = checkedData.length == self.tableData.length;
			// 更新购物车已选商品总价格
			self.updateTotalPrice();
		},
		
		/**
		 * 获取选中的商品
		 */
		getCheckedData() {
			let checkedData = uni.getStorageSync('checkedData');
			return checkedData ? checkedData : [];
		},
		
		/*单选*/
		checkItem(e, index) {
			e.checked = !e.checked;
			this.$set(this.tableData, index, e);

			// 更新选中记录
			this.onUpdateChecked();
			// 更新购物车已选商品总价格
			this.updateTotalPrice();
			// 更新全选状态
			this.checkedAll = this.getCheckedData().length == this.tableData.length;
		},
		
		/**
		 * 更新商品选中记录
		 */
		onUpdateChecked() {
			let self = this,
				checkedData = [];
			self.tableData.forEach(item => {
				if (item.checked == true) {
					checkedData.push(`${item.product_id}_${item.product_sku_id}`);
				}
			});
			uni.setStorageSync('checkedData', checkedData);
		},
		/*全选*/
		onCheckedAll() {
			let self = this;
			self.checkedAll = !self.checkedAll;
			self.tableData.forEach(item => {
				item.checked = self.checkedAll;
			});
			self.updateTotalPrice();
			// 更新选中记录
			self.onUpdateChecked();
		},
		updateTotalPrice: function() {
			let total_price = 0;
			let items = this.tableData;
			for (let i = 0; i < items.length; i++) {
				if (items[i]['checked'] == true) {
					total_price += items[i]['total_num'] * items[i]['product_price'];
				}
			}
			/*保留2位小数*/
			this.totalPrice = total_price.toFixed(2);
		},
		/*去结算*/
		Submit() {
			let arrIds = [];
			this.tableData.forEach(item => {
				if (item.checked == true) {
					arrIds.push(`${item.product_id}_${item.product_sku_id}`);
				}
			});
			if (arrIds.length == 0) {
				uni.showToast({
					title: '请选择商品',
					icon: 'none'
				});
				return false;
			}
			uni.navigateTo({
				url: '/pages/order/confirm-order?order_type=cart&cart_ids=' + arrIds
			});
		},
		/*添加*/
		addFunc(item) {
			let self = this;
			let product_id = item.product_id;
			let product_sku_id = item.product_sku_id;
			uni.showLoading({
				title: '加载中'
			});
			self._post(
				'order.cart/add',
				{
					product_id: product_id,
					product_sku_id: product_sku_id,
					total_num: 1
				},
				function(res) {
					self.loadding = false;
					self.getData();
				},
				function() {
					self.loadding = false;
				}
			);
		},
		/*减少*/
		reduceFunc(item) {
			let self = this;
			let product_id = item.product_id;
			let product_sku_id = item.product_sku_id;
			if (item.total_num <= 1) {
				return;
			}
			uni.showLoading({
				title: '加载中'
			});
			self._post(
				'order.cart/sub',
				{
					product_id: product_id,
					product_sku_id: product_sku_id
				},
				function(res) {
					self.loadding = false;
					self.getData();
				},
				function() {
					self.loadding = false;
				}
			);
		},
		/*删除购物车*/
		onDelete() {
			let self = this;
			let cartIds = self.getCheckedIds();
			if (!cartIds.length) {
				self.showError('您还没有选择商品');
				return false;
			}
			uni.showModal({
				title: '提示',
				content: '您确定要移除选择的商品吗?',
				success(e) {
					e.confirm &&
						self._post(
							'order.cart/delete',
							{
								product_sku_id: cartIds
							},
							function(res) {
								// 删除选中的商品
								self.onDeleteEvent(cartIds);
								self.getData();
							}
						);
				}
			});
		},
		/**
		 * 获取已选中的商品
		 */
		getCheckedIds() {
			let self = this;
			let arrIds = [];
			self.tableData.forEach(item => {
				if (item.checked === true) {
					arrIds.push(`${item.product_id}_${item.product_sku_id}`);
				}
			});
			return arrIds;
		},

		/**
		 * 商品删除事件
		 */
		onDeleteEvent(cartIds) {
			let self = this;
			cartIds.forEach(cartIndex => {
				self.tableData.forEach((item, productIndex) => {
					if (cartIndex == `${item.product_id}_${item.product_sku_id}`) {
						self.tableData.splice(productIndex, 1);
					}
				});
			});
			// 更新选中记录
			self.onUpdateChecked();
			return true;
		},
		/**
		 * 是否在数组内
		 */
		inArray(search, array) {
			for (var i in array) {
				if (array[i] == search) {
					return true;
				}
			}
			return false;
		},

		/*去购物*/
		gotoShop() {
			uni.switchTab({
				url: '/pages/index/index'
			});
		}
	}
};
</script>

<style lang="scss">
	page {
		background-color: #f2f2f2;
	}

	.foot_ {
		height: 98rpx;
		width: 100%;
	}

	.card .scroll-Y {
		position: relative;
	}

	.card .checkbox {
		color: red;
		transform: scale(0.7);
	}

	.address-bar {
		padding: 20rpx;
		background-color: #f2f2f2;
	}

	.address-bar button {
		border: none;
		background: none;
		color: #333333;
	}

	.section {
		background: #f2f2f2;
		padding: 20rpx;
	}

	.section .item {
		margin: 0 26rpx;
		display: flex;
		align-items: center;
		// border: 1px solid #f2f2f2;
		padding-right: 19rpx;
		padding-bottom: 29rpx;
		padding-top: 29rpx;
	}

	.section .cover {
		width: 150rpx;
		height: 150rpx;
		border-radius: 8px;
	}

	.section .info {
		flex: 1;
		padding-left: 30rpx;
		box-sizing: border-box;
		overflow: hidden;
	}

	.section .title {
		width: 100%;
		font-size: 26rpx;
		display: -webkit-box;
		overflow: hidden;
		-webkit-line-clamp: 2;
		-webkit-box-orient: vertical;
	}

	.vender .list .describe {
		width: 100%;
		white-space: nowrap;
		overflow: hidden;
		text-overflow: ellipsis;
	}

	.section .describe {
		margin-top: 20rpx;
		font-size: 24rpx;
		color: #999999;
		display: -webkit-box;
		-webkit-box-orient: vertical;
		-webkit-line-clamp: 3;
		overflow: hidden;
	}

	.section .price {
		color: #F6220C;
		font-size: 24rpx;
	}

	.section .price .num {
		padding: 0 4rpx;
		font-size: 32rpx;
	}

	.section .level-box {
		margin-top: 20rpx;
		display: flex;
		justify-content: space-between;
		align-items: center;
	}

	.section .level-box .key {
		font-size: 24rpx;
		color: #999999;
	}

	.section .level-box .num-wrap {
		display: flex;
		justify-content: flex-end;
		align-items: center;
	}

	.section .level-box .icon-box {
		width: 33rpx;
		height: 33rpx;
		border: 1px solid #c5c5c5;
		background: #f2f2f2;
	}

	.section .level-box .icon-box .gray {
		color: #cccccc;
	}

	.section .level-box .icon-box .gray3 {
		color: #333333;
	}

	.section .level-box .text-wrap {
		margin: 0 20rpx;
		height: 33rpx;
		border: none;
		background: none;
	}

	.section .level-box .text-wrap input {
		padding: 0 4rpx;
		height: 33rpx;
		line-height: 1;
		width: 40rpx;
		font-size: 32rpx;
		text-align: center;
		display: flex;
		align-items: center;
		min-height: 33rpx;
	}

	.bottom-btns {
		position: fixed;
		width: 100%;
		padding: 0 0 0 20rpx;
		box-sizing: border-box;
		display: flex;
		justify-content: space-between;
		align-items: center;
		height: 90rpx;
		/* bottom: calc(var(--window-bottom); */
		// bottom: var(--window-bottom,0);
		bottom: 0;
		left: 0;
		box-shadow: 0 -2rpx 8rpx rgba(0, 0, 0, 0.1);
		background: #ffffff;
		z-index: 1000;
	}

	.bottom-btns .delete-btn {
		margin: 0;
		padding: 0 30rpx;
		height: 60rpx;
		line-height: 60rpx;
		border-radius: 30rpx;
		background: linear-gradient(90deg, #FF6B6B 4%, #F6220C 100%);
		font-size: 26rpx;
	}

	.bottom-btns .buy-btn {
		margin: 0;
		padding: 0 24rpx;
		height: 60rpx;
		line-height: 60rpx;
		border-radius: 30rpx;
		background: linear-gradient(90deg, #FF6B6B 4%, #F6220C 100%);
		font-size: 26rpx;
	}

	.bottom-btns .price {
		color: $dominant-color;
	}

	.supplier_list {
		overflow: hidden;
		background-color: #FFFFFF;
		border-radius: 15rpx;
		margin-bottom: 30rpx;
	}

	.supplier_list_tit {
		display: flex;
		align-items: center;
		margin-left: 28rpx;
		margin-top: 28rpx;
	}

	.icon-dianpu1 {
		font-size: 34rpx;
		color: #333333;
		margin: 0 17rpx;
	}

	.cart_none .cart_none_img {
		width: 348rpx;
		height: 222rpx;
	}

	.none_btn {
		font-size: 32rpx;
		border-radius: 40rpx;
	}

	.add_icon,
	.reduce_icon {
		width: 32rpx;
		height: 32rpx;
	}
</style>
